U.S. EPA registered pesticide info
'Msco No. 4m Mushroom Fly Dust (contains Malathion )' is an insecticide and miticide. Its Federal EPA registration number is: 237-12. It was originally approved by EPA on 09 Oct 1967. Its registration got cancelled on 10 Oct 1989. It has a 'Caution' signal word. It has the following active ingredients: Malathion (NO INERT USE). It's approved for 1 sites including mushrooms. It is also approved for 3 pests and pest groups including but not limited to cecidomyid midges, mushroom flies, and phorid flies.